Method of casting refrigerator doobs



latentecl May 19, 1925.

UNITED, STATES lnrrsu'r OFFICE} LLOYD G. COIPEMAN, OF FLINT, MICHIGAN.

METHODOF CASTING REFRIGERATOR DOORS.

Application filed June 25, 1923. Serial No. 647,600.

making cold moldings of semi-fluid material, such for instance, as sections of a stone refrigerator or a stone-lined refrigera tor. It is the object of the invention to afford a method by which such parts can be satisfactorily cold cast and finished.

In the drawings:

F'g. 1 is a vertical cross section of the mold showing the parts used with the mold.

Fig! 2 is a perspectiie ofthe same.

Fig. 3 is a cross-section of the same on the line 33 of Fig. l.

The flask is preferably made up of three sections, outer sections a and b and center section 0. These are bolted together with the bolts (3. At the top of the center section a funnel shaped pouring tube 6 has its stem portion threaded into the mold. The interior of the flask is vented with the vent openings 7" which run through the top. of the mold.

The bolts 5/ in one of the flask memberssupport the inserts h which are bushings that are cast into the work for the purpose of permitting the attachment of another men'iher such as the outside panel of the door to the lining.

'Down through the center of the filler tube I inserta core in the form of a straw tube or other piece which is designated 2' and which may be extracted after the casting operation for the purpose of leaving a hole in the casting so that the casting may be mounted upon an arbor in working on the same to finish it, as for instance, in buffing it or smoothing it out, or in otherwise working on it.

This discovery relates to a method for.

It is very necessary that the pouring and venting be at the top as the mold is poured with a. concrete mixture the same drops to the bottom expelling the air as the contents of the flask rise in the mold. hen the mixture appears at the top of the vent tube,

the operator knows that. the mold is full,

hence the vent assa e serves not onl' tov l3 vent the air at the proper place, but also as anindicator to apprise the operator when the mold is full.

The mixture or composition used in making refrigerator linings is preferably one of the composit ions of the so-called oxide chloride cement which is a well-known preparation to be had on the market.

Various plastic materials may be used for this purpose provided they harden after having been poured, hence it is unneces sary to describe in. detail just the ingredients that go to make up the composition.

hat ll claim is:

l. A method of casi'i-ing and finishing stone-work sections in molds, which comprises the pouring the cementitious material into the mold at the center of the top of the same, and the inserting of a long thin removable. core through the pour opening and removing the same to provide a hole in the. work to receive an arbor. and the supporting of the same upon such arbor to complete the finishing operations.

2. A method of making and finishing stonework sections or linings, which com prises the pouring of a plastic material at the top of a mold, the insertion of a re movable core in the mold and the drawing of the core for the purpose of leaving an opening in which the molded article may receive an arbor to turn the same while working on it,

and the supporting of the rough casting on such arbor to smooth and finish the same. In testn'nony ture.

whereof I ailix my signa- LLOYD o. COPEMAN. 

